Catalytic Enantioselective Ring-Opening Reactions of Cyclopropanes
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A new route for the preparation of four new indolizidines, (1R,2S,6S,7S,8aS)- and (1R,2S,6R,7R,8aS)-1,2,6,7-tetrahydroxyindolizidine (30 and 32) and (1S,2R,7S,8S,8a-R)- and (1S,2R,7R,8R,8a-R)1,2,7,8-tetrahydroxyindolizidine (44 and 46), is reported. The sy ...
Using readily available chiral auxiliaries such as (+)- and (-)-camphanic acid, (R,R)- and (S,S)-tartaric acid derivatives (e.g. RADO(R)-COCl, SADO(R)-COCl) efficient diastereoselective syntheses of rare sugars and glycomimetics have been developed. They e ...
Sulphur dioxide reacts with 1-oxydienes generating zwitterions which are quenched by enoxysilanes to form substituted silyl alkenylsulfinates. These intermediates are desilylated with Bu4NF and the resulting sulfinates react with MeI giving the correspondi ...
Starting from inexpensive furan and furfuryl alcohol, a noniterative approach to the synthesis of pentadeca-1,3,5,7,9,11,13,15-octols and their derivatives has been developed. The method relies upon the double [4+3]-cycloaddition of 1,1,3-trichloro-2-oxyla ...
In the presence of a catalytic amt. of (Schiff base)Al(III)Cl complex (Schiff base of (R,R)-1,2-cyclohexanediamine with 3,5-di-tert-butyl-2-hydroxybenzaldehyde), reaction between alpha -isocyanoacetamides and aldehydes afforded the corresponding 5-aminooxa ...
Starting from inexpensive furan and furfuryl alcohol, a noniterative approach to the synthesis of pentadeca-1,3,5,7,9,11,13,15-octols and their derivatives has been developed. The method relies upon the double [4+3]-cycloaddition of 1,1,3-trichloro-2-oxyla ...
